Marina disc brakes

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philthehill
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Marina disc brakes

Postby philthehill » Sat Jan 30, 2021 8:25 pm



Bigrob
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Re: Marina disc brakes

Postby Bigrob » Sat Jan 30, 2021 10:00 pm

I would snap these up if they were closer.

It's a shame living at the most southerly point sometimes!
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Re: Marina disc brakes

Postby Bigrob » Mon Feb 01, 2021 7:13 pm

philthehill wrote:
Sat Jan 30, 2021 8:25 pm
May be of interest:-

https://www.ebay.co.uk/itm/Morris-marin ... SwgzVfuRxp

I'm considering buying these, once posted they'll owe me about £70.

Do you think this is worth it? And how much else is needed to make it do able?
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philthehill
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Re: Marina disc brakes

Postby philthehill » Mon Feb 01, 2021 7:38 pm

The Marina disc brake set up is good. I have them on my Minor and they give a good stopping power even without a servo.

You can get the correct replacement hubs from ESM so as to be able to fit the Minor wheels.
https://www.morrisminorspares.com/brake ... al-p829471
The PCD of the Marina is 3.75" whilst the PCD of the Minor is 4" so Minor wheels will not fit Marina hubs. If you want to fit the original Marina hubs and therefore 13" wheels you will need qty 2 adapter top hat sleeve from ESM. You do need to speak with ESM about the adapter sleeves especially reference availability. They bought the adapter sleeves from Bullmotif when they bought all their Minor parts/stock and once gone there are no plans to procure/make more.
When using the original Marina hubs you will need the adapter sleeves, replacement inner and outer wheel bearings.
The ESM replacement hubs do away with the need for adapter sleeves and replacement bearings.

The Marina disc brake set up listed on 'e' bay looks to be in good condition but I would advise that you replace the calliper seals - available from ESM.

Your all up cost would be a lot cheaper than buying a full new kit @ £389 plus VAT @ 20% (£466)

As an added bonus the Marina stub axles can be fitted to the Minor swivels after machining so do not discard the Marina swivels once the disc brake assy have been removed. I have Marina stub axles fitted to my Minor.


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Re: Marina disc brakes

Postby Bigrob » Mon Feb 01, 2021 7:54 pm

Brilliant thank you Phil.

I'll be purchasing the new hubs as I intend to keep the minor wheels.

What of this set-up am I actually using?

I've tried searching but all I can find is information in reference to the kits
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philthehill
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Re: Marina disc brakes

Postby philthehill » Mon Feb 01, 2021 8:14 pm

What information do you require.
The Marina disc brake parts are unbolted from the Marina swivel and bolted straight onto the Minor swivel.
Even easier if you have the ESM hubs.
The wheel bearings for the ESM hubs are taper roller bearings so should not be done up tight as per the Minor wheel bearings. You should have 3/16" rocking movement at the wheel periphery.
When you next go for your MOT make sure that you tell the MOT tester that you have taper roller bearings fitted and not the preloaded Minor ball race bearings otherwise they may give you a fail for worn wheel bearings.
You will need to take out of the brake master cylinder the 'top hat' seal otherwise you will get a build up of line pressure and smoking disc pads.
If required - any torque settings I can provide from the BL Marina/Ital workshop manual.


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Re: Marina disc brakes

Postby Bigrob » Mon Feb 01, 2021 8:59 pm

Thanks Phil.


I'm assuming swapping the full swivel is a no-go, so what's the benefit of swapping the stubs?


Fingers crossed I've got no intention of taking it for another mot, being a historic vehicle now.
But I understand the need for the 3/16".

The previous owner had a marina set up already installed, and had been using it for some time so I assume the Top Hat seal has already been done as the brakes were never reconnected after the disc setup was removed. I will be replacing the MC seals anyway so I'll make sure to check it's been done
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philthehill
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Re: Marina disc brakes

Postby philthehill » Mon Feb 01, 2021 9:16 pm

The Marina swivel is totally different to the Minor swivel so they cannot be interchanged.
The Marina swivel top bearing is a ball joint similar to the Mini. The bottom trunnion is similar to the Minor but of a larger diameter and the steering arms are different.
The main benefit of fitting the Marina stub axle is that the Marina stub axle is larger so much stronger. You can then use off the shelf taper roller bearings with no adapter sleeve.


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Re: Marina disc brakes

Postby Bigrob » Mon Feb 01, 2021 9:49 pm

Ah I see, makes a lot of sense.

I assume if I'm using the ESM hubs then I wont be needing an adapter? This surely would mean I couldn't use the marina stub
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Re: Marina disc brakes

Postby philthehill » Tue Feb 02, 2021 7:52 am

If you use the ESM hubs then you will not be able to use the Marina stub axle as the bearings used with the ESM hubs are a different size to suit the Minor stub axle. Even if you do not use the Marina stub axles they are a valuable commodity and can be sold on.
The Marina hubs fitted to my Minor have had the PCD changed from 3.75" to a PCD of 4".
Changing the PCD was all part of the Grumpys Marina disc brake conversion for the Minor as was the adapter sleeve to get around the difference in stub axle sizes.


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Re: Marina disc brakes

Postby Bigrob » Tue Feb 02, 2021 11:17 am

Ah I see, that makes sense.

There is a chap locally who works at a machine shop, so I may ask him about converting the marina hubs and fitting the stubs to the Minor swivels.

I imagine this would be cheaper than buying the ESM hubs.

Plus, obviously dependant on availability, I would be able to use standard Marina bearings.

Is the brake pipe in the caliper the same as the Minor wheel cylinders?
I'll be replacing the brake lines anyway.

I also read about putting essentially the equivalent to the MC tophats inline to the rear brakes to keep the rear drums as they should be, but I can't see that being any help without disrupting the return to the MC
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Re: Marina disc brakes

Postby philthehill » Tue Feb 02, 2021 12:19 pm

If you want to use the Marina hub with a standard Minor stub axle you cannot use standard Marina wheel bearings.
You have to use the revised bearings and the adapter sleeve. I will post the part numbers on here in due course.
If you use a Marina stub axle you will still have to use the adapter sleeve but shortened to provide a seat for the lip of the Marina hub oil seal because the Minor hub oil seal seat is of a smaller diameter.
Below are the Grumpys modified hubs and the shortened sleeve adapter. Note the Marina stub axle fitted.
The Marina brake pipe unions are UNF so you will have to change the brake pipes or get new nipples/nuts fitted.
Grumpy hub 1.jpg
Grumpy hub 1.jpg (60.23 KiB) Viewed 275 times
Grumpy hub 2.jpg
Grumpy hub 2.jpg (67.64 KiB) Viewed 275 times
Grumpys sleeve 1.JPG
Grumpys sleeve 1.JPG (362.32 KiB) Viewed 274 times


Bigrob
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Re: Marina disc brakes

Postby Bigrob » Tue Feb 02, 2021 12:39 pm

Yep, understood.

I'll stick with the ESM hubs then I think.

Assuming standard marina discs to be used?

I've got the new caliper seals on order. The car is a long way off being on the roax. But one job at a time and it all gets done
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philthehill
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Re: Marina disc brakes

Postby philthehill » Tue Feb 02, 2021 3:09 pm

Standard Marina discs are the order of the day.


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Re: Marina disc brakes

Postby Bigrob » Tue Feb 02, 2021 3:19 pm

Appreciate it, thank you Phil
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Re: Marina disc brakes

Postby Bigrob » Mon Feb 08, 2021 8:40 pm

Finally delivered today, after the courier refused to pick them up twice because "there was too much tape on the box"...

They actually seem to be in really good condition.

Hardly any wear on the discs, and new pads in them, although the pads will be replaced
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Re: Marina disc brakes

Postby Bigrob » Mon Feb 08, 2021 8:44 pm

I'm trying to post a couple of photos of these but it's not letting me
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Re: Marina disc brakes

Postby Bigrob » Tue Feb 09, 2021 10:21 am

20210208_203907.jpg
20210208_203907.jpg (1.58 MiB) Viewed 135 times
20210208_203852.jpg
20210208_203852.jpg (1.91 MiB) Viewed 135 times
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philthehill
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Re: Marina disc brakes

Postby philthehill » Tue Feb 09, 2021 10:56 am

Looking good to go :D
Well done. 8)


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Re: Marina disc brakes

Postby Bigrob » Tue Feb 09, 2021 11:02 am

Thanks Phil. I'm assuming I can replace the flexi pipe on this with a Minor one, and keep the flexi-caliper pipe as it is?
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